Youth experience significant mental health (MH) needs, and gender- and racially/ethnically-diverse youth are less likely than peers to receive care. School-based health centers (SBHCs) are a healthcare delivery model that may decrease disparities. This study examined the role of SBHCs in reducing disparities in MH care receipt among SBHC clients. Data from electronic health records of 5,396 youth ages 12 to 21 years who visited 14 SBHCs in one California county from 2021-2023 were analyzed in 2023-2024 using multiple logistic regression to assess disparities in MH care receipt and depression screenings. Receipt of MH care from SBHCs varied significantly by gender but not age, sexual orientation, or race/ethnicity. Compared to female clients, males had reduced odds (AOR: 0.50) and gender-diverse clients had higher odds (AOR: 2.70) of receiving MH care. For receipt of depression screenings, male clients had reduced odds (AOR: 0.86); Latino clients had higher odds than white clients (AOR: 1.80); and older adolescents and young adults had higher odds than younger adolescents (AORs: 1.44 and 1.45, respectively). Receipt of follow-up MH care after a positive depression result varied only by gender, with male clients having reduced odds (AOR: 0.63). SBHCs may reach youth who are traditionally less likely to seek care in other settings, including racially/ethnically- and gender-diverse youth. As in other settings, engaging males in healthcare is an area for improvement. These findings help to demonstrate the potential of SBHCs for decreasing disparities in mental health care.